Is there any set standard or approximate for fixed training,I have been told it pays dividends for road racing?,,"eg: 120 rpm (AT) 30kph" I would like to dial a gear and train in it for the duration of the ride,,

There is an equation to express gearing, but there's no standard as to which gearing to use for an individual's training. What fixed wheel training gives is approx 20-30% extra work (subject to terrain and other parameters) and variable cadence (spin). You can ride harder on multi-geared bike and achieve the same level of work.

There's 2 schools of thought, old school and new schoolOld school is what brenteno has quoted. Really low gear 52.5" I think he quoted (too lazy to scroll down)New school is what I do. 81" and smash the [something] out of it. I've hit 70kph on it

Both Old school and New school have their benefits.

I'll give you 2 options;1. Ride whatever comes with it and if you hate it change it2. Train on different gears, changing it every so often